Henry b



(No Model.)

. H. B. FORD.

CYLINDER FOR AIR PUMPS Am) AIR GOMPRESSORS. No. 363,453.

Patented May 24, 1887 AU awn u, PETERS. mwunmgnwm' wuwn lw. u. c

HENRY 13. FORD, OF NFRV YORK, N. Y.,

PATENT OFFICE.

ASSIGNOR TO PERKINS 8t WELSH, OF

s'AME PLACE.

CYLINDER FOR AlR-PUMPS AND AIR-COMPRESSORS.

SPECIFICATION forming part of Letters Patent No.363,453, dated May 24,1887.

- Application filed October 18, 1886. Serial No. 216,106. (No model.)

To all whom it may concern:

Be it known that I, HENRY B. FORD, of the city, county, and State of NewYork, have invented a new and useful Improvement in Cylinders of air orother gas compressors, whereby water is caused more efficiently tocirculate through said rod, piston, and jacket for the purpose ofcooling said parts.

My invention consists in the construction and arrangement of themechanism as more particularly hereinafter set forth.

In the accompanying drawings, Figure l is a longitudinal section of myapparatus, and Fig. 2 is a transverse section on the line w w of Fig. 1.

Similar letters of reference indicate like parts.

A is the compressor-cylinder. Bis a piston in said cylinder. 0 is thepiston-rod. D is the water-jacket surrounding the cylinder A.

U The piston and piston-rod are made hollow.

Outside of and communicating with the waterjacket D is a small auxiliarypump-cylinder, E. This pump has also a hollow piston, F, and a hollowpiston-rod, G. Piston-rod G is rigidly connected by a tubularconnection, H, inany suitable way with the main piston-rod 0; hence thepiston F moves in its cylinder E simultaneously with the movement of thepiston B in the cylinder A. Of course, if it be desired that the pistonF shall have a shorter stroke than the piston B, any suitablereducing-gear may be used to convey motion from the main to theauxiliary piston-rod, and in such case the tube H may be made of rubberor any other suitable flexible material. In my present drawings 1' show,however, that the piston F has a stroke equal in length to that ofpiston, B, a break being made across both cylinders A and E to indicatethis. The small piston F is hollow, and has a valve, I, which opensinwardly.

J is a pipe entering the small cylinder E. K is a valve opening intosaid cylinder.

L is a valve opening into the pipe M, which passes into the water-jacketD, and nearly to the end of the same.

The valves I, K, and L are here shown as simple clap-valves; but ofcourse they may be of any other known construction.

Within the main piston-rod O is a pipe, N, which passes through said rodand communicates with the interior of the piston B. O is an openingbetween the interior of said piston and the annular space P in thepiston-rod inclosing the pipe N. The outer end of the pis ton-rod O isclosed. A break is shown in the rod 0 to indicate that the pipe N hereextends through its whole length. Said pipe may be provided with aflexible extension at Q, which I will not interfere with thereciprocation of the piston-rod. well-known construction.

The operation of the above-described mechanism is as follows: When thepiston B is moving. outward-that is, from left to right in thedrawings-the piston F in cylinder E moves in the same direction. tonthen closes, the valve K opens and the valve L shuts. Water is thendrawn into the cylinder E. On the return-stroke of the main piston Bthatis, from right to left in the drawings-the piston F moves in the samedirection. The valve K then shuts and the valves I and L open.Consequently the wa ter which has been drawn into the cylinder E is nowforced part through the tube M into the waterjacket D, through which itcirculates and escapes by a pipe, (not shown) and part through thehollow piston G, whence it passes into the annular space P in the mainpiston-rod O. From the rod 0 the water passes through the opening 0 intothe piston R is a stuffing-box of ordinary The valve in said pis- B, andfrom said piston into the tube N, and

. low piston and piston-rocl therein, combined supply the jacket withwater and force the with an auxiliary pump-cylinder having a Water intoand out of the main piston, sub- IO valvular connection with awater-supply, and stantially as described.

also with the water-'aeket of the main 0 linder, a hollow valvulzlrpiston in said auxil lalry HENRY FORD pump-cylinder, and a hollowpiston-rod there- Witnesses: for, connected with the hollow piston-rodof JAMEs S. GREVES, the main cylinder, and moving therewith to PARKBENJAMIN.

